Good startups usually take 10 years.
If you pivot, do it fully and with conviction. The worst thing is to try to do a bit of the old and the new-it's hard to kill your babies.
... fire fast when it's not working. It's better for the company, it's also better for the employee.
You have to find a small market in which you can get a monopoly and then quickly expand.
Be suspicious of any work that is not building product or getting customers.
Startups are very hard no matter what you do; you may as well go after a big opportunity.